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C, B. AUEL AND D. C. PULTNEY.

SAFETY GUARD FOB MACHINE TGOLS.

APPLICATION FILED Nov. 18, 191s.

1,808,027. Patented July 1, 1919.

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I can 5.*AU'7VNTORS David C. Puhney.

BY j ATTORNEY c. 3.111111 AND D; c. PULTNEY.

SAFETY GUARD FOR MACHINE TUOLS.

APPLICATION FILED NOV. 18,1916.

Panted my 1, 1919. 2 SHEETS-SHEET 2 David C. Pci/Tf1@ wn'NEssEs;

iTEjn sTATEs PATENT onirica.

CARI. B. AUEI. AND DAVID o. PULTNEY, or wILKINsBUnG, `rirNNsrLvANIA, Assieivons ro wnsTINerIOUsii `mincraic AND MANUFACTURING COMPANY, A CORPORATION 0F PENNSYLVANIA.

Specification of Letters Patent.

SAFETY-GUARD ron MACHINE-Toons.

Patented Julyl, 1919.

Application inea November is, 191e. serial No. iaaoaa.

Safety-Guardsfor Machine-Tools, of which the following is aspecifcation. y i Ourinvention relates to safety devices for machine tools and the like, and it has for its object to provide a simple and effective guard for wood-planin machines and similar machine tools whici shall be associated with the usual work guide of the machine in" such manner as to effectually cover the `mac tive portion of the moving tool at all times without interfering with the neoessaryadjustment of the guide.

ln the accompanying drawing, Figure 1"is a partial plan view of a wood-planing l"machine provided with a guard constructed in accordance with our invention, Fig. 2 is an end elevational view of the structure shown in Fig. 1, and Fig. 3 is a rear elevational view of the same structure.

The planing machine shown in the drawing comprises a rotary planer drum 1 mounted in suitable bearings beneatha table 2 and driven by means of a pulley 3 from any suitable source of power. The peripheryof the drum 1 projects slightly above 'the table 2, as is usual in machines of this type. A vertical guide plate 4 extends across the planer drum 1 and is adjustably supported upon the table 1 in any usual manner, the direction of adjustment of the guide plate being such that it is maintained across, and perpendicular to, the axis of the planer drum 1.

ln the operation of the planer tool, the work is placed upon the table at the left of, and in engagement with, the guide plate 4, and the portion of the planer drum 1 at the right of the guide 4 is entirely inactive and is a source of danger' to the operator of the machine as well as to other persons. In order to effectually cover this part of the planer drum and the driving pulley asso' ciated with it, we provide a guard consisting of a series of parallel, flanged rollers or spools 53 'which are rotatably carried by rods 6; The ends of the rods 6 extend through openings iii overlapping flat linksl 7 which serve to flexibly connect the rollers together.

One endof the set of rollers just described hangs freely beyond the pulley 3, as shown inFig. 2, and the other end is attached to therear ofthe guide plate 4 in any suitable manner, sol that the guard moves with the guide plate y.and conforms automatically to changes in its position.` As shown, alsheet metaldiousin 8 is secured, by means of screws 9 or ot ierwise, tothe rear horizontal portion ofthe `guide 4, and the ends of the chains formed by the links 7 are secured to the housing 8 by means of screws 10 or in Vany other suitable manner. The particular method of attaching the rollers to the guide will be p varied in accordance with the different structures ofthe guides in various machines to which our invention is applied. An apron 11"of leather or other, flexible sheet material extends over the rollers or spools 5 and is attached, atone end, to the housing 8 by means of a clamping bar 12 and screws 13. Atensioning weight 14 is at-fI taclied to the outer depending end ofthe apron 11` and maintains the apron taut. As shown in Fig.` 2, the guard extends not only over the planer drum 1 but over the `pulley 3, being supported beyond the table 2 by` means ofa sheetmetalapron lsupported lupontlie pulleyhousing` 16 and provided with upturned side flanges 17 which serve to prevent undue lateral displacement of the guard rollers.

While we have shown and described a form of device which we have found to be very effective for applying our invention to actual use, itis to be understood that the specific structure herein set forth may be variously modified without exceeding the limits of our invention and that our invention is therefore to be construed as comprehending all such modifications and adaptations as fall within the scope of the appended claims.

We claim as our invention: 1. A guard for machine tools and the lik comprising a series of flanged rollers flexibly connected together and a flexible apron supported upon the said rollers.

2. A guard fo-r machine tools and the like comprising a series of hanged rollers flexibly connected together, a fleaible apron sup ported upon the said rollers, Aand means for tensioning the said belt.

3.V A; guard for machine toolsand-the like comprising a series of parallel flanged rollk ers connected together -by means of short links, and a llexi'ble apron supported upon the said rollers.

4:. A; guard for machine tools and the like comprising a series of'parallel flanged rollers rotatably carried by rods and connected by means of links associated with the 'said rods,

'and a flexible apron supported upon the i comprising aflexibler apron supported on rollers and disposed with: one end. attached to an adjustable part of the machine and with its other end hanging vfreely over the sidefof` the` machine frame,`vand a tensioning weight attached to' the hanging end oit y the apron.i

7.'. A; planing machine comprising a table, a rotary planer toolhaving itsy periphery projecting slightly above the said table, a workY guide ,adjustably' secured to the said l table'andlextending across. ythe axis 'of the said rotary tool, a lflexible guard extending aboV'e the inactive part of the'sai'd rotary tool, with one end attached tothe said guide. A and the Vother'end hanging freely over the edge of the said. table, Y Weight attached to thehangingend. of the i andl a tensioning said apron..

Uopiet of this-'patent 'may'be obtained for ive cents each, by addressing the iCommissioner of 8. A guard for machine tools and the like comprising a series ol rollers l'lexibly connectedtogether and a flexible apron supported upon the rollers.

9. .et guard lor machine tools andthe like comprising a series ol' rollers flexibly connectcdtogether,Vv a liexible apron supported upon the rollers, and means cooperating be- 't'ween the rollers and apron for maintainlng the apron in pla-ce.

l0. A guard 'tor machine tools and the like comprisino` a plurality ot flexibly connected spaced roers having llanges at their ends to support their intermediate portions above the projecting tool when the flanges rest uponl'he table, and a flexible apron supported. upon the rollers and reta-ined by the flanges, the series of rollers and apron heilig connected to the guide.

1117A. guard for machine tools and thc like lcomprising a plurality of spaced sub` stantially parallel members, flexible connections between the members, a lexi'ble apron resting upon the members and means cooperating between the members and apron for maintaining the apron in place.

l2., The combination with a planing machine including a table, of a plurality of spaced flexibly connected substantially parallelY members, a flexible apron supported upon the members and means carried by the members operating to both support them above the table and to retain the aprony in place. v

In testimony whereof we have hereunto subscribed our names this 31st day of Oct., 1916.

CARL. n AUEL. DAVID c. PUL'rNnY.

Patents,

Washington, D. C. 

